This caused a change in geological processes going from a convergent zone to a subduction zone. The Philippine Trench (also called Philippine Deep, Mindanao Trench, and Mindanao Deep) is an underwater trench to the east of the Philippines. The subduction zone is located west to east of the Philippine Islands. Posts Tagged ‘Cotabato trench’ Magnitude-4.2 quake hits off Sultan Kudarat By Aytch dela Cruz A magnitude-4.2 offshore tremor jolted the province of Sultan Kudarat yesterday morning, based on latest data from the Philippine Institute of… It has a length of approximately 1,320 km (820 mi) and a width of about 30 km (19 mi) from the centre of the Philippine island of Luzon trending southeast to the northern Maluku island of Halmahera in Indonesia. The trench formed from a collision between the Palawan and Zamboanga plates. Its magnitude was calculated as being as high as 8.0 on the moment magnitude scale.

Philippine Trench, also called Philippine Deep, Mindanao Trench, or Mindanao Deep, submarine trench in the floor of the Philippine Sea of the western North Pacific Ocean bordering the east coast of the island of Mindanao.The abyss, which reaches the second greatest depth known in any ocean, was first plumbed in 1927 by the German ship Emden. The central part of the Philippine fault formed during the Plio-Pleistocene times is considered to be an active depression of the Earth's crust. The 1976 Moro Gulf earthquake and tsunami took place on August 17 at 00:11 local time near the islands of Mindanao and Sulu, in the Philippines.

The Philippine trench is hypothesized to be younger than 8–9 million years ago.